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   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #ifndef AST_T_H
  21 #define AST_T_H
  22
  23 #include <libfirm/firm_types.h>
  24 #include <assert.h>
  25
  26 #include "ast.h"
  27 #include "symbol.h"
  28 #include "token_t.h"
  29 #include "type.h"
  30 #include "adt/obst.h"
  31
  32 /** The AST obstack contains all data that must stay in the AST. */
  33 extern struct obstack ast_obstack;
  34
  35 /**
  36  * Operator precedence classes
  37  */
  38 typedef enum precedence_t {
  39         PREC_BOTTOM,
  40         PREC_EXPRESSION,     /* ,                                  left to right */
  41         PREC_ASSIGNMENT,     /* = += -= *= /= %= <<= >>= &= ^= |=  right to left */
  42         PREC_CONDITIONAL,    /* ?:                                 right to left */
  43         PREC_LOGICAL_OR,     /* ||                                 left to right */
  44         PREC_LOGICAL_AND,    /* &&                                 left to right */
  45         PREC_OR,             /* |                                  left to right */
  46         PREC_XOR,            /* ^                                  left to right */
  47         PREC_AND,            /* &                                  left to right */
  48         PREC_EQUALITY,       /* == !=                              left to right */
  49         PREC_RELATIONAL,     /* < <= > >=                          left to right */
  50         PREC_SHIFT,          /* << >>                              left to right */
  51         PREC_ADDITIVE,       /* + -                                left to right */
  52         PREC_MULTIPLICATIVE, /* * / %                              left to right */
  53         PREC_CAST,           /* (type)                             right to left */
  54         PREC_UNARY,          /* ! ~ ++ -- + - * & sizeof           right to left */
  55         PREC_POSTFIX,        /* () [] -> .                         left to right */
  56         PREC_PRIMARY,
  57         PREC_TOP
  58 } precedence_t;
  59
  60 /**
  61  * Expression kinds.
  62  */
  63 typedef enum expression_kind_t {
  64         EXPR_UNKNOWN = 0,
  65         EXPR_INVALID,
  66         EXPR_REFERENCE,
  67         EXPR_CONST,
  68         EXPR_CHARACTER_CONSTANT,
  69         EXPR_WIDE_CHARACTER_CONSTANT,
  70         EXPR_STRING_LITERAL,
  71         EXPR_WIDE_STRING_LITERAL,
  72         EXPR_COMPOUND_LITERAL,
  73         EXPR_CALL,
  74         EXPR_CONDITIONAL,
  75         EXPR_SELECT,
  76         EXPR_ARRAY_ACCESS,
  77         EXPR_SIZEOF,
  78         EXPR_CLASSIFY_TYPE,
  79         EXPR_ALIGNOF,
  80
  81         EXPR_FUNCNAME,
  82         EXPR_BUILTIN_SYMBOL,
  83         EXPR_BUILTIN_CONSTANT_P,
  84         EXPR_BUILTIN_PREFETCH,
  85         EXPR_OFFSETOF,
  86         EXPR_VA_START,
  87         EXPR_VA_ARG,
  88         EXPR_STATEMENT,
  89         EXPR_LABEL_ADDRESS, /**< GCC extension &&label operator */
  90
  91         EXPR_UNARY_FIRST,
  92         EXPR_UNARY_NEGATE = EXPR_UNARY_FIRST,
  93         EXPR_UNARY_PLUS,
  94         EXPR_UNARY_BITWISE_NEGATE,
  95         EXPR_UNARY_NOT,
  96         EXPR_UNARY_DEREFERENCE,
  97         EXPR_UNARY_TAKE_ADDRESS,
  98         EXPR_UNARY_POSTFIX_INCREMENT,
  99         EXPR_UNARY_POSTFIX_DECREMENT,
 100         EXPR_UNARY_PREFIX_INCREMENT,
 101         EXPR_UNARY_PREFIX_DECREMENT,
 102         EXPR_UNARY_CAST,
 103         EXPR_UNARY_CAST_IMPLICIT, /**< compiler generated cast */
 104         EXPR_UNARY_ASSUME,        /**< MS __assume() */
 105         EXPR_UNARY_LAST = EXPR_UNARY_ASSUME,
 106
 107         EXPR_BINARY_FIRST,
 108         EXPR_BINARY_ADD = EXPR_BINARY_FIRST,
 109         EXPR_BINARY_SUB,
 110         EXPR_BINARY_MUL,
 111         EXPR_BINARY_DIV,
 112         EXPR_BINARY_MOD,
 113         EXPR_BINARY_EQUAL,
 114         EXPR_BINARY_NOTEQUAL,
 115         EXPR_BINARY_LESS,
 116         EXPR_BINARY_LESSEQUAL,
 117         EXPR_BINARY_GREATER,
 118         EXPR_BINARY_GREATEREQUAL,
 119         EXPR_BINARY_BITWISE_AND,
 120         EXPR_BINARY_BITWISE_OR,
 121         EXPR_BINARY_BITWISE_XOR,
 122         EXPR_BINARY_LOGICAL_AND,
 123         EXPR_BINARY_LOGICAL_OR,
 124         EXPR_BINARY_SHIFTLEFT,
 125         EXPR_BINARY_SHIFTRIGHT,
 126         EXPR_BINARY_ASSIGN,
 127         EXPR_BINARY_MUL_ASSIGN,
 128         EXPR_BINARY_DIV_ASSIGN,
 129         EXPR_BINARY_MOD_ASSIGN,
 130         EXPR_BINARY_ADD_ASSIGN,
 131         EXPR_BINARY_SUB_ASSIGN,
 132         EXPR_BINARY_SHIFTLEFT_ASSIGN,
 133         EXPR_BINARY_SHIFTRIGHT_ASSIGN,
 134         EXPR_BINARY_BITWISE_AND_ASSIGN,
 135         EXPR_BINARY_BITWISE_XOR_ASSIGN,
 136         EXPR_BINARY_BITWISE_OR_ASSIGN,
 137         EXPR_BINARY_COMMA,
 138
 139         EXPR_BINARY_BUILTIN_EXPECT,
 140         EXPR_BINARY_ISGREATER,
 141         EXPR_BINARY_ISGREATEREQUAL,
 142         EXPR_BINARY_ISLESS,
 143         EXPR_BINARY_ISLESSEQUAL,
 144         EXPR_BINARY_ISLESSGREATER,
 145         EXPR_BINARY_ISUNORDERED,
 146         EXPR_BINARY_LAST = EXPR_BINARY_ISUNORDERED,
 147 } expression_kind_t;
 148
 149 typedef enum funcname_kind_t {
 150         FUNCNAME_FUNCTION,           /**< C99 __func__, older __FUNCTION__ */
 151         FUNCNAME_PRETTY_FUNCTION,    /**< GNUC __PRETTY_FUNCTION__ */
 152         FUNCNAME_FUNCSIG,            /**< MS __FUNCSIG__ */
 153         FUNCNAME_FUNCDNAME           /**< MS __FUNCDNAME__ */
 154 } funcname_kind_t;
 155
 156 /* convenience macros */
 157 #define EXPR_BINARY_CASES                  \
 158         case EXPR_BINARY_ADD:                  \
 159         case EXPR_BINARY_SUB:                  \
 160         case EXPR_BINARY_MUL:                  \
 161         case EXPR_BINARY_DIV:                  \
 162         case EXPR_BINARY_MOD:                  \
 163         case EXPR_BINARY_EQUAL:                \
 164         case EXPR_BINARY_NOTEQUAL:             \
 165         case EXPR_BINARY_LESS:                 \
 166         case EXPR_BINARY_LESSEQUAL:            \
 167         case EXPR_BINARY_GREATER:              \
 168         case EXPR_BINARY_GREATEREQUAL:         \
 169         case EXPR_BINARY_BITWISE_AND:          \
 170         case EXPR_BINARY_BITWISE_OR:           \
 171         case EXPR_BINARY_BITWISE_XOR:          \
 172         case EXPR_BINARY_LOGICAL_AND:          \
 173         case EXPR_BINARY_LOGICAL_OR:           \
 174         case EXPR_BINARY_SHIFTLEFT:            \
 175         case EXPR_BINARY_SHIFTRIGHT:           \
 176         case EXPR_BINARY_ASSIGN:               \
 177         case EXPR_BINARY_MUL_ASSIGN:           \
 178         case EXPR_BINARY_DIV_ASSIGN:           \
 179         case EXPR_BINARY_MOD_ASSIGN:           \
 180         case EXPR_BINARY_ADD_ASSIGN:           \
 181         case EXPR_BINARY_SUB_ASSIGN:           \
 182         case EXPR_BINARY_SHIFTLEFT_ASSIGN:     \
 183         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:    \
 184         case EXPR_BINARY_BITWISE_AND_ASSIGN:   \
 185         case EXPR_BINARY_BITWISE_XOR_ASSIGN:   \
 186         case EXPR_BINARY_BITWISE_OR_ASSIGN:    \
 187         case EXPR_BINARY_COMMA:                \
 188         case EXPR_BINARY_BUILTIN_EXPECT:       \
 189         case EXPR_BINARY_ISGREATER:            \
 190         case EXPR_BINARY_ISGREATEREQUAL:       \
 191         case EXPR_BINARY_ISLESS:               \
 192         case EXPR_BINARY_ISLESSEQUAL:          \
 193         case EXPR_BINARY_ISLESSGREATER:        \
 194         case EXPR_BINARY_ISUNORDERED:
 195
 196 #define EXPR_UNARY_CASES                   \
 197         case EXPR_UNARY_NEGATE:                \
 198         case EXPR_UNARY_PLUS:                  \
 199         case EXPR_UNARY_BITWISE_NEGATE:        \
 200         case EXPR_UNARY_NOT:                   \
 201         case EXPR_UNARY_DEREFERENCE:           \
 202         case EXPR_UNARY_TAKE_ADDRESS:          \
 203         case EXPR_UNARY_POSTFIX_INCREMENT:     \
 204         case EXPR_UNARY_POSTFIX_DECREMENT:     \
 205         case EXPR_UNARY_PREFIX_INCREMENT:      \
 206         case EXPR_UNARY_PREFIX_DECREMENT:      \
 207         case EXPR_UNARY_CAST:                  \
 208         case EXPR_UNARY_CAST_IMPLICIT:         \
 209         case EXPR_UNARY_ASSUME:
 210
 211 /**
 212  * A scope containing declarations.
 213  */
 214 struct scope_t {
 215         declaration_t *declarations;      /**< List of declarations in this scope. */
 216         declaration_t *last_declaration;  /**< last declaration in this scope. */
 217         scope_t       *parent;            /**< points to the parent scope. */
 218         unsigned      depth;              /**< while parsing, the depth of this scope in the scope stack. */
 219 };
 220
 221 struct expression_base_t {
 222         expression_kind_t   kind;
 223         type_t             *type;
 224         source_position_t   source_position;
 225 #ifndef NDEBUG
 226         bool                transformed;
 227 #endif
 228 };
 229
 230 struct const_expression_t {
 231         expression_base_t  base;
 232         union {
 233                 long long      int_value;
 234                 long double    float_value;
 235                 string_t       character;
 236                 wide_string_t  wide_character;
 237         } v;
 238         bool               is_ms_noop;  /**< True, if this constant is the result
 239                                              of an microsoft __noop operator */
 240 };
 241
 242 struct string_literal_expression_t {
 243         expression_base_t  base;
 244         string_t           value;
 245 };
 246
 247 struct funcname_expression_t {
 248         expression_base_t  base;
 249         funcname_kind_t    kind;
 250         string_t           value;     /**< the value once assigned. */
 251 };
 252
 253 struct wide_string_literal_expression_t {
 254         expression_base_t  base;
 255         wide_string_t      value;
 256 };
 257
 258 struct compound_literal_expression_t {
 259         expression_base_t  base;
 260         type_t            *type;
 261         initializer_t     *initializer;
 262 };
 263
 264 struct builtin_symbol_expression_t {
 265         expression_base_t  base;
 266         symbol_t          *symbol;
 267 };
 268
 269 struct builtin_constant_expression_t {
 270         expression_base_t  base;
 271         expression_t      *value;
 272 };
 273
 274 struct builtin_prefetch_expression_t {
 275         expression_base_t  base;
 276         expression_t      *adr;
 277         expression_t      *rw;
 278         expression_t      *locality;
 279 };
 280
 281 struct reference_expression_t {
 282         expression_base_t  base;
 283         declaration_t     *declaration;
 284 };
 285
 286 struct call_argument_t {
 287         expression_t    *expression;
 288         call_argument_t *next;
 289 };
 290
 291 struct call_expression_t {
 292         expression_base_t  base;
 293         expression_t      *function;
 294         call_argument_t   *arguments;
 295 };
 296
 297 struct unary_expression_t {
 298         expression_base_t  base;
 299         expression_t      *value;
 300 };
 301
 302 struct binary_expression_t {
 303         expression_base_t  base;
 304         expression_t      *left;
 305         expression_t      *right;
 306 };
 307
 308 struct select_expression_t {
 309         expression_base_t  base;
 310         expression_t      *compound;
 311         declaration_t     *compound_entry;
 312 };
 313
 314 struct array_access_expression_t {
 315         expression_base_t  base;
 316         expression_t      *array_ref;
 317         expression_t      *index;
 318         bool               flipped; /**< index/ref was written in a 5[a] way */
 319 };
 320
 321 struct typeprop_expression_t {
 322         expression_base_t  base;
 323         type_t            *type;
 324         expression_t      *tp_expression;
 325 };
 326
 327 struct designator_t {
 328         source_position_t  source_position;
 329         symbol_t          *symbol;
 330         expression_t      *array_index;
 331         designator_t      *next;
 332 };
 333
 334 struct offsetof_expression_t {
 335         expression_base_t  base;
 336         type_t            *type;
 337         designator_t      *designator;
 338 };
 339
 340 struct va_start_expression_t {
 341         expression_base_t  base;
 342         expression_t      *ap;
 343         declaration_t     *parameter;
 344 };
 345
 346 struct va_arg_expression_t {
 347         expression_base_t  base;
 348         expression_t      *ap;
 349 };
 350
 351 struct conditional_expression_t {
 352         expression_base_t  base;
 353         expression_t      *condition;
 354         expression_t      *true_expression;
 355         expression_t      *false_expression;
 356 };
 357
 358 struct statement_expression_t {
 359         expression_base_t  base;
 360         statement_t       *statement;
 361 };
 362
 363 struct classify_type_expression_t {
 364         expression_base_t  base;
 365         expression_t      *type_expression;
 366 };
 367
 368 struct label_address_expression_t {
 369         expression_base_t  base;
 370         declaration_t     *declaration;
 371 };
 372
 373 union expression_t {
 374         expression_kind_t                kind;
 375         expression_base_t                base;
 376         const_expression_t               conste;
 377         funcname_expression_t            funcname;
 378         string_literal_expression_t      string;
 379         wide_string_literal_expression_t wide_string;
 380         compound_literal_expression_t    compound_literal;
 381         builtin_symbol_expression_t      builtin_symbol;
 382         builtin_constant_expression_t    builtin_constant;
 383         builtin_prefetch_expression_t    builtin_prefetch;
 384         reference_expression_t           reference;
 385         call_expression_t                call;
 386         unary_expression_t               unary;
 387         binary_expression_t              binary;
 388         select_expression_t              select;
 389         array_access_expression_t        array_access;
 390         typeprop_expression_t            typeprop;
 391         offsetof_expression_t            offsetofe;
 392         va_start_expression_t            va_starte;
 393         va_arg_expression_t              va_arge;
 394         conditional_expression_t         conditional;
 395         statement_expression_t           statement;
 396         classify_type_expression_t       classify_type;
 397         label_address_expression_t       label_address;
 398 };
 399
 400 typedef enum storage_class_tag_t {
 401         STORAGE_CLASS_NONE,
 402         STORAGE_CLASS_EXTERN,
 403         STORAGE_CLASS_STATIC,
 404         STORAGE_CLASS_TYPEDEF,
 405         STORAGE_CLASS_AUTO,
 406         STORAGE_CLASS_REGISTER,
 407         STORAGE_CLASS_ENUM_ENTRY,
 408         STORAGE_CLASS_THREAD,
 409         STORAGE_CLASS_THREAD_EXTERN,
 410         STORAGE_CLASS_THREAD_STATIC,
 411 } storage_class_tag_t;
 412
 413 typedef enum namespace_t {
 414         NAMESPACE_NORMAL,
 415         NAMESPACE_STRUCT,
 416         NAMESPACE_UNION,
 417         NAMESPACE_ENUM,
 418         NAMESPACE_LABEL,
 419         NAMESPACE_LOCAL_LABEL
 420 } namespace_t;
 421
 422 typedef enum initializer_kind_t {
 423         INITIALIZER_VALUE,
 424         INITIALIZER_LIST,
 425         INITIALIZER_STRING,
 426         INITIALIZER_WIDE_STRING,
 427         INITIALIZER_DESIGNATOR
 428 } initializer_kind_t;
 429
 430 struct initializer_base_t {
 431         initializer_kind_t kind;
 432 };
 433
 434 struct initializer_value_t {
 435         initializer_base_t  base;
 436         expression_t       *value;
 437 };
 438
 439 struct initializer_list_t {
 440         initializer_base_t  base;
 441         size_t              len;
 442         initializer_t      *initializers[];
 443 };
 444
 445 struct initializer_string_t {
 446         initializer_base_t base;
 447         string_t           string;
 448 };
 449
 450 struct initializer_wide_string_t {
 451         initializer_base_t  base;
 452         wide_string_t       string;
 453 };
 454
 455 struct initializer_designator_t {
 456         initializer_base_t  base;
 457         designator_t       *designator;
 458 };
 459
 460 union initializer_t {
 461         initializer_kind_t        kind;
 462         initializer_base_t        base;
 463         initializer_value_t       value;
 464         initializer_list_t        list;
 465         initializer_string_t      string;
 466         initializer_wide_string_t wide_string;
 467         initializer_designator_t  designator;
 468 };
 469
 470 /**
 471  * GNU attributes.
 472  */
 473 typedef enum gnu_attribute_kind_t {
 474         GNU_AK_CONST,
 475         GNU_AK_VOLATILE,
 476         GNU_AK_CDECL,
 477         GNU_AK_STDCALL,
 478         GNU_AK_FASTCALL,
 479         GNU_AK_DEPRECATED,
 480         GNU_AK_NOINLINE,
 481         GNU_AK_NORETURN,
 482         GNU_AK_NAKED,
 483         GNU_AK_PURE,
 484         GNU_AK_ALWAYS_INLINE,
 485         GNU_AK_MALLOC,
 486         GNU_AK_WEAK,
 487         GNU_AK_CONSTRUCTOR,
 488         GNU_AK_DESTRUCTOR,
 489         GNU_AK_NOTHROW,
 490         GNU_AK_TRANSPARENT_UNION,
 491         GNU_AK_COMMON,
 492         GNU_AK_NOCOMMON,
 493         GNU_AK_PACKED,
 494         GNU_AK_SHARED,
 495         GNU_AK_NOTSHARED,
 496         GNU_AK_USED,
 497         GNU_AK_UNUSED,
 498         GNU_AK_NO_INSTRUMENT_FUNCTION,
 499         GNU_AK_WARN_UNUSED_RESULT,
 500         GNU_AK_LONGCALL,
 501         GNU_AK_SHORTCALL,
 502         GNU_AK_LONG_CALL,
 503         GNU_AK_SHORT_CALL,
 504         GNU_AK_FUNCTION_VECTOR,
 505         GNU_AK_INTERRUPT,
 506         GNU_AK_INTERRUPT_HANDLER,
 507         GNU_AK_NMI_HANDLER,
 508         GNU_AK_NESTING,
 509         GNU_AK_NEAR,
 510         GNU_AK_FAR,
 511         GNU_AK_SIGNAL,
 512         GNU_AK_EIGTHBIT_DATA,
 513         GNU_AK_TINY_DATA,
 514         GNU_AK_SAVEALL,
 515         GNU_AK_FLATTEN,
 516         GNU_AK_SSEREGPARM,
 517         GNU_AK_EXTERNALLY_VISIBLE,
 518         GNU_AK_RETURN_TWICE,
 519         GNU_AK_MAY_ALIAS,
 520         GNU_AK_MS_STRUCT,
 521         GNU_AK_GCC_STRUCT,
 522         GNU_AK_DLLIMPORT,
 523         GNU_AK_DLLEXPORT,
 524         GNU_AK_ALIGNED,
 525         GNU_AK_ALIAS,
 526         GNU_AK_SECTION,
 527         GNU_AK_FORMAT,
 528         GNU_AK_FORMAT_ARG,
 529         GNU_AK_WEAKREF,
 530         GNU_AK_NONNULL,
 531         GNU_AK_TLS_MODEL,
 532         GNU_AK_VISIBILITY,
 533         GNU_AK_REGPARM,
 534         GNU_AK_MODEL,
 535         GNU_AK_MODE,
 536         GNU_AK_TRAP_EXIT,
 537         GNU_AK_SP_SWITCH,
 538         GNU_AK_SENTINEL,
 539         GNU_AK_LAST
 540 } gnu_attribute_kind_t;
 541
 542 /**
 543  * Extended microsoft modifier.
 544  */
 545 typedef enum decl_modifier_t {
 546         DM_DLLIMPORT         = 1 <<  0,
 547         DM_DLLEXPORT         = 1 <<  1,
 548         DM_THREAD            = 1 <<  2,
 549         DM_NAKED             = 1 <<  3,
 550         DM_MICROSOFT_INLINE  = 1 <<  4,
 551         DM_FORCEINLINE       = 1 <<  5,
 552         DM_SELECTANY         = 1 <<  6,
 553         DM_NOTHROW           = 1 <<  7,
 554         DM_NOVTABLE          = 1 <<  8,
 555         DM_NORETURN          = 1 <<  9,
 556         DM_NOINLINE          = 1 << 10,
 557         DM_RESTRICT          = 1 << 11,
 558         DM_NOALIAS           = 1 << 12,
 559         DM_PACKED            = 1 << 13,
 560         DM_TRANSPARENT_UNION = 1 << 14,
 561         DM_CONST             = 1 << 15,
 562         DM_PURE              = 1 << 16,
 563         DM_CONSTRUCTOR       = 1 << 17,
 564         DM_DESTRUCTOR        = 1 << 18,
 565         DM_UNUSED            = 1 << 19,
 566         DM_USED              = 1 << 20,
 567         DM_CDECL             = 1 << 21,
 568         DM_FASTCALL          = 1 << 22,
 569         DM_STDCALL           = 1 << 23,
 570         DM_THISCALL          = 1 << 24,
 571         DM_DEPRECATED        = 1 << 25
 572 } decl_modifier_t;
 573
 574 typedef unsigned decl_modifiers_t;
 575
 576 struct declaration_t {
 577         unsigned char       namespc;
 578         unsigned char       declared_storage_class;
 579         unsigned char       storage_class;
 580         unsigned char       alignment;          /**< Alignment of the declaration, 0 for default. */
 581         decl_modifiers_t    modifiers;          /**< modifiers. */
 582         const char         *deprecated_string;  /**< MS deprecated string if any. */
 583         symbol_t           *get_property_sym;   /**< MS get property. */
 584         symbol_t           *put_property_sym;   /**< MS put property. */
 585         unsigned int        address_taken : 1;  /**< Set if the address of this declaration was taken. */
 586         unsigned int        is_inline     : 1;
 587         unsigned int        used          : 1;  /**< Set if the declaration is used. */
 588         unsigned int        read          : 1;
 589         unsigned int        implicit      : 1;  /**< Set for implicit (not found in source code) declarations. */
 590         unsigned int        need_closure  : 1;  /**< Inner function needs closure. */
 591         unsigned int        goto_to_outer : 1;  /**< Inner function has goto to outer function. */
 592         type_t             *type;
 593         il_size_t           offset;             /**< The offset of this member inside a compound. */
 594         symbol_t           *symbol;
 595         source_position_t   source_position;
 596         union {
 597                 bool            complete;           /**< used to indicate whether struct/union types are already defined or if just the name is declared */
 598                 statement_t    *statement;
 599                 initializer_t  *initializer;
 600                 expression_t   *enum_value;
 601         } init;
 602         scope_t             scope;              /**< The scope that this declaration opens. */
 603         scope_t            *parent_scope;       /**< The parent scope where this declaration lives. */
 604
 605         /** next declaration in a scope */
 606         declaration_t      *next;
 607         /** next declaration with same symbol */
 608         declaration_t      *symbol_next;
 609
 610         /* the following fields are used in ast2firm module */
 611         unsigned char       declaration_kind;
 612         union {
 613                 unsigned int  value_number;
 614                 ir_entity    *entity;
 615                 ir_node      *block;
 616                 ir_node      *vla_base;
 617                 tarval       *enum_val;
 618                 ir_type      *irtype;
 619         } v;
 620 };
 621
 622 typedef enum statement_kind_t {
 623         STATEMENT_INVALID,
 624         STATEMENT_EMPTY,
 625         STATEMENT_COMPOUND,
 626         STATEMENT_RETURN,
 627         STATEMENT_DECLARATION,
 628         STATEMENT_IF,
 629         STATEMENT_SWITCH,
 630         STATEMENT_EXPRESSION,
 631         STATEMENT_CONTINUE,
 632         STATEMENT_BREAK,
 633         STATEMENT_GOTO,
 634         STATEMENT_LABEL,
 635         STATEMENT_CASE_LABEL,
 636         STATEMENT_WHILE,
 637         STATEMENT_DO_WHILE,
 638         STATEMENT_FOR,
 639         STATEMENT_ASM,
 640         STATEMENT_MS_TRY,          /**< MS __try/__finally or __try/__except */
 641         STATEMENT_LEAVE            /**< MS __leave */
 642 } statement_kind_t;
 643
 644 struct statement_base_t {
 645         statement_kind_t   kind;
 646         statement_t       *next;
 647         source_position_t  source_position;
 648         statement_t       *parent;
 649         bool               reachable;
 650 #ifndef NDEBUG
 651         bool               transformed;
 652 #endif
 653 };
 654
 655 struct invalid_statement_t {
 656         statement_base_t  base;
 657 };
 658
 659 struct empty_statement_t {
 660         statement_base_t  base;
 661 };
 662
 663 struct return_statement_t {
 664         statement_base_t  base;
 665         expression_t     *value;
 666 };
 667
 668 struct compound_statement_t {
 669         statement_base_t  base;
 670         statement_t      *statements;
 671         scope_t           scope;
 672 };
 673
 674 struct declaration_statement_t {
 675         statement_base_t  base;
 676         declaration_t    *declarations_begin;
 677         declaration_t    *declarations_end;
 678 };
 679
 680 struct if_statement_t {
 681         statement_base_t  base;
 682         expression_t     *condition;
 683         statement_t      *true_statement;
 684         statement_t      *false_statement;
 685 };
 686
 687 struct switch_statement_t {
 688         statement_base_t        base;
 689         expression_t           *expression;
 690         statement_t            *body;
 691         case_label_statement_t *first_case, *last_case;  /**< List of all cases, including default. */
 692         case_label_statement_t *default_label;           /**< The default label if existent. */
 693         unsigned long           default_proj_nr;         /**< The Proj-number for the default Proj. */
 694 };
 695
 696 struct goto_statement_t {
 697         statement_base_t  base;
 698         declaration_t    *label;         /**< The destination label. */
 699         expression_t     *expression;    /**< The expression for an assigned goto. */
 700         goto_statement_t *next;          /**< links all goto statements of a function */
 701 };
 702
 703 struct case_label_statement_t {
 704         statement_base_t        base;
 705         expression_t           *expression;    /**< The case label expression, NULL for default label. */
 706         expression_t           *end_range;     /**< For GNUC case a .. b: the end range expression, NULL else. */
 707         case_label_statement_t *next;          /**< link to the next case label in switch */
 708         statement_t            *statement;
 709         long                   first_case;     /**< The folded value of expression. */
 710         long                   last_case;      /**< The folded value of end_range. */
 711         bool                   is_bad;         /**< If set marked as bad to suppress warnings. */
 712         bool                   is_empty_range; /**< If set marked this as an empty range. */
 713 };
 714
 715 struct label_statement_t {
 716         statement_base_t   base;
 717         declaration_t     *label;
 718         statement_t       *statement;
 719         label_statement_t *next;    /**< links all label statements of a function */
 720 };
 721
 722 struct expression_statement_t {
 723         statement_base_t  base;
 724         expression_t     *expression;
 725 };
 726
 727 struct while_statement_t {
 728         statement_base_t  base;
 729         expression_t     *condition;
 730         statement_t      *body;
 731 };
 732
 733 struct do_while_statement_t {
 734         statement_base_t  base;
 735         expression_t     *condition;
 736         statement_t      *body;
 737 };
 738
 739 struct for_statement_t {
 740         statement_base_t  base;
 741         expression_t     *initialisation;
 742         expression_t     *condition;
 743         expression_t     *step;
 744         statement_t      *body;
 745         scope_t           scope;
 746         bool              condition_reachable:1;
 747         bool              step_reachable:1;
 748 };
 749
 750 struct asm_argument_t {
 751         string_t        constraints;
 752         expression_t   *expression;
 753         symbol_t       *symbol;
 754         asm_argument_t *next;
 755 };
 756
 757 struct asm_clobber_t {
 758         string_t       clobber;
 759         asm_clobber_t *next;
 760 };
 761
 762 struct asm_statement_t {
 763         statement_base_t base;
 764         string_t         asm_text;
 765         asm_argument_t  *inputs;
 766         asm_argument_t  *outputs;
 767         asm_clobber_t   *clobbers;
 768         bool             is_volatile;
 769 };
 770
 771 struct ms_try_statement_t {
 772         statement_base_t  base;
 773         statement_t      *try_statement;
 774         expression_t     *except_expression; /**< non-null for except, NULL for finally */
 775         statement_t      *final_statement;
 776 };
 777
 778 struct leave_statement_t {
 779         statement_base_t  base;
 780 };
 781
 782 union statement_t {
 783         statement_kind_t         kind;
 784         statement_base_t         base;
 785         return_statement_t       returns;
 786         compound_statement_t     compound;
 787         declaration_statement_t  declaration;
 788         if_statement_t           ifs;
 789         switch_statement_t       switchs;
 790         goto_statement_t         gotos;
 791         case_label_statement_t   case_label;
 792         label_statement_t        label;
 793         expression_statement_t   expression;
 794         while_statement_t        whiles;
 795         do_while_statement_t     do_while;
 796         for_statement_t          fors;
 797         asm_statement_t          asms;
 798         ms_try_statement_t       ms_try;
 799         leave_statement_t        leave;
 800 };
 801
 802 struct translation_unit_t {
 803         scope_t      scope;
 804         statement_t *global_asm;
 805 };
 806
 807 static inline
 808 void *_allocate_ast(size_t size)
 809 {
 810         return obstack_alloc(&ast_obstack, size);
 811 }
 812
 813 static inline
 814 bool is_invalid_expression(expression_t *expression)
 815 {
 816         return expression->base.kind == EXPR_INVALID;
 817 }
 818
 819 static inline
 820 bool is_invalid_statement(statement_t *statement)
 821 {
 822         return statement->base.kind == STATEMENT_INVALID;
 823 }
 824
 825
 826 #define allocate_ast(size)                 _allocate_ast(size)
 827
 828 #endif